Do methanethiol adsorbates on the Au(111) surface dissociate?

Details Do methanethiol adsorbates on the Au(111) surface dissociate? Do methanethiol adsorbates on the Au(111) surface dissociate?

2006-07-25

arxiv.org/abs/cond-mat/0607658v1

Physics

Condensed Matter

Materials Science

4 pages, 2 figures, 4 tables, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.97.045505

The interaction of methanethiol molecules CH$_{3}$SH with the Au(111) surface is investigated, and it is found for the first time that the S-H bond remains intact when the methanethiol molecules are adsorbed on the regular Au(111) surface. However, it breaks if defects are present in the Au(111) surface. At low coverage, the fcc region is favored for S atom adsorption, but at saturated coverage the adsorption energies at various sites are almost iso-energetic. The presented calculations show that a methanethiol layer on the regular Au(111) surface does not dimerize.

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